Characterizing the Sardinia candidate site for the Einstein Telescope

被引:0
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作者
Naticchioni, L. [1 ]
Allocca, A. [3 ,4 ]
Boschi, V [5 ]
Cadeddu, M. [7 ]
Cadoni, M. [6 ,7 ]
Calloni, E. [3 ,4 ]
Cardello, G. L. [8 ]
Cardini, A. [7 ]
Carpine, M. [9 ,10 ,11 ]
Cittadino, D. [10 ]
Contu, A. [7 ]
D'Ambrosio, M. [12 ]
D'Onofrio, L. [1 ]
D'Urso, D. [8 ,10 ]
Davari, N. [8 ]
De Rosa, R. [3 ,4 ]
Di Fiore, L. [4 ]
Di Giovanni, M. [1 ,2 ]
Dordei, F. [7 ]
Fiori, I [11 ]
Giunchi, C. [12 ]
Harms, J. [13 ,14 ]
Koley, S. [13 ,14 ]
Longo, V [8 ]
Mangano, V [1 ]
Marsella, M. [1 ,2 ]
Migoni, C. [7 ,17 ]
Molinari, I [15 ]
Olivieri, M. [15 ]
Paoletti, F. [5 ]
Puppo, P. [1 ]
Rapagnani, P. [1 ,2 ]
Razzano, M. [5 ,16 ]
Ricci, F. [1 ,2 ]
Rozza, D. [8 ,10 ]
Saccorotti, G. [12 ]
Schillaci, G. [10 ]
Sipala, V [8 ,10 ]
Tringali, M. C. [11 ]
Trozzo, L. [4 ]
Tuveri, M. [6 ,7 ]
机构
[1] Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy
[2] Univ Roma Sapienza, I-00185 Rome, Italy
[3] Univ Napoli Federico II, I-80126 Naples, Italy
[4] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy
[5] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy
[6] Univ Cagliari, I-09124 Cagliari, Italy
[7] Ist Nazl Fis Nucl, Sez Cagliari, I-09042 Cagliari, Italy
[8] Univ Sassari, I-07100 Sassari, Italy
[9] Univ Milano Bicocca, I-20126 Milan, Italy
[10] Ist Nazl Fis Nucl, Lab Nazl Sud, I-95125 Catania, Italy
[11] European Gravitat Observ EGO, I-56021 Cascina, Italy
[12] Ist Nazl Geofis & Vulcanol, Sez Pisa, I-56125 Pisa, Italy
[13] Gran Sasso Sci Inst, I-67100 Laquila, Italy
[14] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67100 Laquila, Italy
[15] Ist Nazl Geofis & Vulcanol, Sez Bologna, I-40127 Bologna, Italy
[16] Univ Pisa, I-56126 Pisa, Italy
[17] Ist Nazl Astrofis, Osservatorio Astron Cagliari, I-09047 Cagliari, Italy
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中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Due to its unique geophysical features and to the low density population of the area, Sos Enattos is a promising candidate site to host the Einstein Telescope (ET), the third-generation Gravitational Wave Observatory. The geophysical characterization of the Sos Enattos former mine, close to one of the proposed ET corners, started in 2010 with the deployment of seismic and environmental sensors underground. Since 2019 a new extensive array of seismometers, magnetometers and acoustic sensors have been installed in three stations along the underground tunnels, with one additional station at the surface. Beside a new geological survey over a wider area, two boreholes about 270 m deep each were excavated at the other two corners, determining the good quality of the drilled granite and orthogneiss rocks and the absence of significant thoroughgoing fault zones. These boreholes are instrumented with broadband seismometers that revealed an outstanding low level of vibrational noise in the low-frequency band of ET-LF (2-10 Hz), significantly lower than the Peterson's NLNM and resulting among the quietest seismic stations in the world in that frequency band. The low seismic background and the reduced number of seismic glitches ensure that just a moderated Newtonian noise subtraction would be needed to achieve the ET target sensitivity. Geoelectrical and active seismic campaigns have been carried out to reveal the features of the subsurface, revealing the presence of small-sized fractured areas with limited water circulation. Finally, temporary arrays of seismometers, magnetometers and acoustic sensors are deployed in the area to study the local sources of environmental noise.
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页数:7
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